互联网时代大学生网络政治参与探微

随着互联网时代的到来,网络政治参与成为当今民主政治建设的一种新形式与新途径。通过对安徽省5所本科院校的大学生网络政治参与现状的调查,发现大多数大学生关心国家政治,愿意参政议政,大学生网络政治参与已成为民主政治建设的一支重要力量。受网络监管措施不力、自身政治素质不成熟等因素影响,大学生容易被网络上错误舆论诱导,导致盲从行为和群体极化现象。需要采取措施,加强网络监管,提高政府有关部门对大学生网络政治参与行为的反馈效率,以提高大学生政治参与的效能感,激发大学生更高的网络政治参与热情,使其积极发挥"正能量",为推进我国的社会主义民主政治建设作出重要贡献。     

GROUNDED THEORY BUILDING FOR THE WORKPLACE

Developing and utilizing theories in the workplace are critical for managers and practitioners to make sense of real‐world issues. Grounded theory building is a viable research methodology that can be utilized in the workplace to help managers and practitioners develop theories, making better sense of workplace issues. This article looks at a general model of grounded theory building and introduces some of the key components involved in conducting grounded theory building.     

Using video analysis to support prospective K-8 teachers’ noticing of students’ multiple mathematical knowledge bases

As part of a larger research project aimed at transforming preK-8 mathematics teacher preparation, the purpose of this study was to examine the extent to which prospective teachers notice children’s competencies related to children’s mathematical thinking, and children’s community, cultural, and linguistic funds of knowledge or what we refer to as children’s multiple mathematical knowledge bases. Teachers’ noticing supports students’ learning in deep and meaningful ways. Researchers designed and enacted a video analysis activity with prospective teachers in their mathematics methods course. The activity served as a decomposition of practice in order to support prospective teachers in engaging in an approximation of the practice of noticing. Our findings showed that prospective teachers evidenced noticing of mathematics teaching and learning as early as the mathematics methods course. We also found that the prompts and structure of the activity supported prospective teachers by increasing their depth of noticing and their foci in noticing, moving from attending primarily to teacher moves (and merely describing what they saw) to becoming aware of significant interactions (and interpreting effects of these interactions on learning). Implications for teacher educators interested in designing and enacting activities to support noticing are discussed.     

零售商主导的闭环供应链效益分析

研究了零售商主导的闭环供应链回收渠道选择及定价决策问题。分析了集中决策模式及三种分散回收模式下的最优回收率、定价决策与系统效益。研究结果表明:在零售商主导的市场结构下,当制造商选择直接回收时,闭环供应链具有较低的销售价格和较高的回收率,制造商利润、零售商利润及系统总利润均最大,对消费者及整个社会更有利。     

Use and value of information sources by parents of child psychiatric patients

Objective: With Web 2.0, the variety of information sources for parents of paediatric psychiatric patients has increased dramatically. Information use theory suggests newer sources supplement rather than supplant traditional sources of health information. This study sought to determine the use and value of traditional and emerging sources of information and whether the subjects had access to highly valued sources of information. Methods: One hundred parents indicated the use and value of six sources of information on the child’s symptoms, diagnoses and treatment. The data were analyzed to determine if significant relationships existed between type of source and the use and value of the information sources. Results: Ninety‐four percent of the subjects had access to the Internet and almost half of those reported using the Social Web. Eighty‐five percent had at least one high‐value information source. The psychiatrist in the clinic, the Internet and the primary care physician were the most highly used and valued sources. Conclusion: Use of digital information sources was greater than found in other studies of similar populations. This use appears to complement rather than supplant more traditional sources. Further studies are needed to see if the negative impact of lack of Internet access is replicated.     

上海市海洋体育产业发展的SWOT分析

运用文献资料法、访谈法、SWOT分析法和问卷调查法,在分析上海海洋体育产业发展现状的基础上,对上海发展海洋体育产业的优势、劣势、机遇和竞争等进行研究,并提出发展上海海洋体育休闲产业的对策。     

Anaerobic work and power output during cycle ergometer exercise: effects of bicarbonate loading

Eight trained male cyclists who competed regularly in track races, were studied under control, alkalotic (NaHCO3) and placebo (CaCO3) conditions in a laboratory setting to study the effect of orally induced metabolic alkalosis on 60 s anaerobic work and power output on a bicycle ergometer. Basal, pre- and post-exercise blood samples in the three conditions were analysed for pH, pCO2, pO2, bicarbonate, base excess and lactate. All blood gas measurements were within normal limits at basal levels. There were significant differences in the amount of work produced, and in the maximal power output produced by the cyclists in the experimental condition when compared to the control and placebo conditions (P less than 0.01). The post-exercise pH decreased in all three conditions (P less than 0.05) and post-exercise pCO2 increased significantly in the alkalosis trial (P less than 0.01). In the alkalotic condition, the pre-exercise base excess and HCO3- levels were both higher (P less than 0.05) than the basal levels, suggesting that the bicarbonate ingestion had a significant increase in the buffering ability of the blood. Post-exercise lactate levels were significantly higher (P less than 0.05) after the alkalotic trial when compared to the other two conditions, immediately post-exercise and for the next 3 min. Post-exercise lactate levels were higher than basal or pre-exercise levels (P less than 0.001). This was true immediately post-exercise and for the next 5 min. The results of this study suggest that NaHCO3 is an effective ergogenic aid when used for typically anaerobic exercise as used in this experiment. We feel that this ergogenic property is probably due to the accelerated efflux of H+ ions from the muscle tissue due to increased extracellular bicarbonate buffering.